Lipid Dynamics During Reproduction In 2 Livebearing Fishes, Gambusia-Holbrooki And Poecilia-Latipinna

    Authors

    G. K. Meffe;F. F. Snelson

    Comments

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    Abbreviated Journal Title

    Can. J. Fish. Aquat. Sci.

    Keywords

    Offspring Size; Mosquitofish; Fisheries; Marine & Freshwater Biology

    Abstract

    In animals, strategies of energy allocation among growth, maintenance and reproduction can be significantly altered by lipid storage. Poeciliid (livebearing) fishes store energy in late summer and fall for overwintering and first reproduction in spring, but derails of energy use in reproduction are lacking. We conducted a laboratory experiment on the eastern mosquitofish (Gambusia holbrooki) and the sailfin molly (Poecilia latipinna) to document changes in lipid content in both the ovary and soma during development of a brood. In females of both species, ovarian lipid content was highest early in embryogeny and then declined; adult somatic lipids increased (were replenished) during embryonic development in mosquitofish, but declined in mollies. Larger clutches sequestered a larger share of body lipids in both species, possibly indicating energetic limits to reproduction. Finally, growth rate was positively correlated with somatic lipid content in both species, indicating among-individual differences in metabolic efficiency or feeding efficiency rather than a trade-off between growth and energy storage.

    Journal Title

    Canadian Journal of Fisheries and Aquatic Sciences

    Volume

    50

    Issue/Number

    10

    Publication Date

    1-1-1993

    Document Type

    Article

    Language

    English

    First Page

    2185

    Last Page

    2191

    WOS Identifier

    WOS:A1993MU35200017

    ISSN

    0706-652X

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